Calculating Average Time Span

[capri1231]

I am having problems calculating an average time span. I need to determine how log it takes for a technician to "acknowledge" a ticket when it is created by the Help Desk.

source="servername" Assignee="*" GroupName="TierII" OR GroupName="TierIII" 
| stats min(DateTimeAssign) AS begin max(DateTimeAcknow) AS end by CallID,GroupName,Assignee,Priority 
| eval duration=round(end-begin) | eval hours=duration/3600 | eval minutes=round(duration/60) 
| eval Created=strftime(begin," %b %d, %Y %T %p") 
| eval Closed=strftime(end," %b %d, %Y %T %p")
| chart avg(hours) values(CallID) values(Created) as Assigned values(Closed) as Ack values(minutes) over GroupName 

[lguinn2]

Try this

source="servername" Assignee="*" GroupName="TierII" OR GroupName="TierIII" 
| stats min(DateTimeAssign) AS begin max(DateTimeAcknow) AS end by CallID,GroupName,Assignee,Priority 
| eval duration=round(end-begin) 
| eval Created=strftime(begin," %b %d, %Y %T %p") 
| eval Closed=strftime(end," %b %d, %Y %T %p")
| stats avg(duration) as avgDuration values(CallID) values(Created) as Assigned values(Closed) as Ack by GroupName
| fieldformat avgDuration = tostring(avgDuration,"duration")